Sewing machine



FIG. 1 is a front perspective view of a sewing machine showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front perspective view with the floor panel in closed position;

FIG. 4 is a rear perspective view thereof;

FIG. 5 is a front perspective view with the handle in extended position; and

FIG. 6 is a front perspective view with the top cover in open position. 

The ornamental design for a sewing machine, as shown and described. 